Hard to Keep Casual

Sleeping with your best friend is a terrible idea.
I should know- I'm currently doing it.
He's been my work husband for years.
My actual husband? Never gonna happen.
He's charming, cocky, and far too good-looking.
But when my dad sends us to Miami to open a new branch, electricity sizzles between us.
Maybe it's the sun. Maybe it's the mojitos. Maybe it's my hook-up buddy walking around our shared space in nothing but a towel. (Rude!)
So I make a brilliant, foolproof plan:
Keep it casual.
Keep it fun.
Definitely, 100% don't fall for him.
Easy, right?
Until he starts acting like my actual boyfriend. Then my feelings get very real, and suddenly, I'm the idiot who caught feelings in a no-strings-attatched arrangement.
I just want this to not end in total disaster.
One of us is going to lose this game.
And I have a sinking feeling…
It's gonna be me.